When a Jeep Doesnt Change Gear and Shows a 1 Instead of D Lack of Response Whining, Clunking and Humming Leaking/Low Fluid Grinding or Shaking Called-for Smell Refuses to Become Into Gear Check Engine Calorie-free Manual Noisy in Neutral Gears Slipping Dragging Clutch OBD2 Trouble Codes Become the Problem Diagnosed Your car's manual is a complex mechanical system that controls the application of ability from the engine to the driveshaft. It experiences more habiliment and tear over time than most other parts of your vehicle due to the heat and friction produced past their many moving and interacting components. At the bottom of this folio yous can find a Fair Replacement Cost Guide on pop models of manual.